/usr/lib/x86_64-linux-gnu/libaf.so.3 is in libarrayfire-unified3 3.2.2+dfsg1-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libaf.so.3.2.2
/usr/lib/x86_64-linux-gnu/libaf.so.3.2.2